ER 6f, adjustment suspension

Hello, my Kawa dealer set the suspension to the softest level on my machine, so that the machine gets a little lower, because I’m pretty ‘short’ Since I’m quite shaken when I’m driving over a bottom shaft or a shaft lid, I wonder now if that wouldn’t be so bad if the suspension was harder? Since I also made the driving school on my own machine, I didn’t have any way of comparing whether this would be right now. in general so shakes or just not can you tell me if a harder spring adjustment rather worsens or improves the shaking? Best regards! nico